/****************************************************************************
**
** Copyright (C) 2018 Alexander Akulich <akulichalexander@gmail.com>
**
** Sailfish Silica UI is under copyright of Jolla Ltd.
**
** Based on Qt Material style
**
****************************************************************************/

#ifndef QQUICKSILICASTYLE_P_H
#define QQUICKSILICASTYLE_P_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//

#include <QColor>

#if (QT_VERSION >= QT_VERSION_CHECK(5, 10, 0))
#include <QtQuickControls2/private/qquickattachedobject_p.h>
#else
#include <QtQuickControls2/private/qquickstyleattached_p.h>
#endif // Qt 5.10

#ifdef USE_MLITE
#include <MGConfItem>
#endif // USE_MLITE

QT_BEGIN_NAMESPACE

#if (QT_VERSION >= QT_VERSION_CHECK(5, 10, 0))
class QQuickSilicaStyle : public QQuickAttachedObject
#else
class QQuickSilicaStyle : public QQuickStyleAttached
#endif // Qt 5.10
{
    Q_OBJECT
    Q_PROPERTY(Theme theme READ theme WRITE setTheme RESET resetTheme NOTIFY themeChanged FINAL)
    Q_PROPERTY(QVariant primary READ primary WRITE setPrimary RESET resetPrimary NOTIFY primaryChanged FINAL)
    Q_PROPERTY(QVariant accent READ accent WRITE setAccent RESET resetAccent NOTIFY accentChanged FINAL)
    Q_PROPERTY(QVariant foreground READ foreground WRITE setForeground RESET resetForeground NOTIFY foregroundChanged FINAL)
    Q_PROPERTY(QVariant background READ background WRITE setBackground RESET resetBackground NOTIFY backgroundChanged FINAL)
    Q_PROPERTY(int elevation READ elevation WRITE setElevation RESET resetElevation NOTIFY elevationChanged FINAL)

    Q_PROPERTY(qreal paddingSmall READ paddingSmall CONSTANT FINAL)
    Q_PROPERTY(qreal paddingMedium READ paddingMedium CONSTANT FINAL)
    Q_PROPERTY(qreal paddingLarge READ paddingLarge CONSTANT FINAL)

    Q_PROPERTY(QColor highlightColor READ highlightColor CONSTANT) // TODO: remove?
    Q_PROPERTY(QColor highlightDimmerColor READ highlightDimmerColor CONSTANT)

    Q_PROPERTY(QColor primaryColor READ primaryColor NOTIFY primaryChanged FINAL) // TODO: remove?
    Q_PROPERTY(QColor accentColor READ accentColor NOTIFY accentChanged FINAL) // TODO: remove?
    Q_PROPERTY(QColor backgroundColor READ backgroundColor NOTIFY backgroundChanged FINAL)
    Q_PROPERTY(QColor primaryTextColor READ primaryTextColor NOTIFY paletteChanged FINAL)
    Q_PROPERTY(QColor primaryHighlightedTextColor READ primaryHighlightedTextColor NOTIFY paletteChanged FINAL)
    Q_PROPERTY(QColor secondaryTextColor READ secondaryTextColor NOTIFY paletteChanged FINAL)
    Q_PROPERTY(QColor hintTextColor READ hintTextColor NOTIFY paletteChanged FINAL)
    Q_PROPERTY(QColor textSelectionColor READ textSelectionColor NOTIFY paletteChanged FINAL)
    Q_PROPERTY(QColor dropShadowColor READ dropShadowColor NOTIFY paletteChanged FINAL)
    Q_PROPERTY(QColor dividerColor READ dividerColor NOTIFY paletteChanged FINAL)
    Q_PROPERTY(QColor iconColor READ iconColor NOTIFY paletteChanged FINAL)
    Q_PROPERTY(QColor iconDisabledColor READ iconDisabledColor NOTIFY paletteChanged FINAL)
    Q_PROPERTY(QColor buttonColor READ buttonColor NOTIFY paletteChanged FINAL)
    Q_PROPERTY(QColor buttonDisabledColor READ buttonDisabledColor NOTIFY paletteChanged FINAL)
    Q_PROPERTY(QColor highlightedButtonColor READ highlightedButtonColor NOTIFY paletteChanged FINAL)
    Q_PROPERTY(QColor highlightBackgroundColor READ highlightBackgroundColor CONSTANT)
    Q_PROPERTY(QColor frameColor READ frameColor NOTIFY paletteChanged FINAL)
    Q_PROPERTY(QColor rippleColor READ rippleColor NOTIFY paletteChanged FINAL)
    Q_PROPERTY(QColor highlightedRippleColor READ highlightedRippleColor NOTIFY paletteChanged FINAL)
    Q_PROPERTY(QColor switchUncheckedTrackColor READ switchUncheckedTrackColor NOTIFY paletteChanged FINAL)
    Q_PROPERTY(QColor switchCheckedTrackColor READ switchCheckedTrackColor NOTIFY paletteChanged FINAL)
    Q_PROPERTY(QColor switchUncheckedHandleColor READ switchUncheckedHandleColor NOTIFY paletteChanged FINAL)
    Q_PROPERTY(QColor switchCheckedHandleColor READ switchCheckedHandleColor NOTIFY paletteChanged FINAL)
    Q_PROPERTY(QColor switchDisabledTrackColor READ switchDisabledTrackColor NOTIFY paletteChanged FINAL)
    Q_PROPERTY(QColor switchDisabledHandleColor READ switchDisabledHandleColor NOTIFY paletteChanged FINAL)
    Q_PROPERTY(QColor scrollBarColor READ scrollBarColor NOTIFY paletteChanged FINAL)
    Q_PROPERTY(QColor scrollBarHoveredColor READ scrollBarHoveredColor NOTIFY paletteChanged FINAL)
    Q_PROPERTY(QColor scrollBarPressedColor READ scrollBarPressedColor NOTIFY paletteChanged FINAL)
    Q_PROPERTY(QColor dialogColor READ dialogColor NOTIFY paletteChanged FINAL)
    Q_PROPERTY(QColor backgroundDimColor READ backgroundDimColor NOTIFY paletteChanged FINAL)
    Q_PROPERTY(QColor listHighlightColor READ listHighlightColor NOTIFY paletteChanged FINAL)
    Q_PROPERTY(QColor tooltipColor READ tooltipColor NOTIFY paletteChanged FINAL)
    Q_PROPERTY(QColor toolBarColor READ toolBarColor NOTIFY paletteChanged FINAL)
    Q_PROPERTY(QColor toolTextColor READ toolTextColor NOTIFY paletteChanged FINAL)
    Q_PROPERTY(QColor spinBoxDisabledIconColor READ spinBoxDisabledIconColor NOTIFY paletteChanged FINAL)

public:
    enum Theme {
        Light,
        Dark,
        System
    };

    enum Color {
        Red,
        Pink,
        Purple,
        DeepPurple,
        Indigo,
        Blue,
        LightBlue,
        Cyan,
        Teal,
        Green,
        LightGreen,
        Lime,
        Yellow,
        Amber,
        Orange,
        DeepOrange,
        Brown,
        Grey,
        BlueGrey
    };

    enum Shade {
        Shade50,
        Shade100,
        Shade200,
        Shade300,
        Shade400,
        Shade500,
        Shade600,
        Shade700,
        Shade800,
        Shade900,
        ShadeA100,
        ShadeA200,
        ShadeA400,
        ShadeA700,
    };

    Q_ENUM(Theme)
    Q_ENUM(Color)
    Q_ENUM(Shade)

    explicit QQuickSilicaStyle(QObject *parent = nullptr);

    static QQuickSilicaStyle *qmlAttachedProperties(QObject *object);

    Theme theme() const;
    void setTheme(Theme theme);
    void inheritTheme(Theme theme);
    void propagateTheme();
    void resetTheme();

    QVariant primary() const;
    void setPrimary(const QVariant &accent);
    void inheritPrimary(uint primary, bool custom);
    void propagatePrimary();
    void resetPrimary();

    QVariant accent() const;
    void setAccent(const QVariant &accent);
    void inheritAccent(uint accent, bool custom);
    void propagateAccent();
    void resetAccent();

    QVariant foreground() const;
    void setForeground(const QVariant &foreground);
    void inheritForeground(uint foreground, bool custom, bool has);
    void propagateForeground();
    void resetForeground();

    QVariant background() const;
    void setBackground(const QVariant &background);
    void inheritBackground(uint background, bool custom, bool has);
    void propagateBackground();
    void resetBackground();

    int elevation() const;
    void setElevation(int elevation);
    void resetElevation();

    qreal paddingSmall() const;
    qreal paddingMedium() const;
    qreal paddingLarge() const;

    QColor highlightColor() const;
    QColor highlightBackgroundColor() const;
    QColor highlightDimmerColor() const;

    QColor primaryColor() const;
    QColor accentColor() const;
    QColor backgroundColor() const;
    QColor primaryTextColor() const;
    QColor primaryHighlightedTextColor() const;
    QColor secondaryTextColor() const;
    QColor hintTextColor() const;
    QColor textSelectionColor() const;
    QColor dropShadowColor() const;
    QColor dividerColor() const;
    QColor iconColor() const;
    QColor iconDisabledColor() const;
    QColor buttonColor() const;
    QColor buttonDisabledColor() const;
    QColor highlightedButtonColor() const;
    QColor highlightedButtonDisabledColor() const;
    QColor frameColor() const;
    QColor rippleColor() const;
    QColor highlightedRippleColor() const;
    QColor switchUncheckedTrackColor() const;
    QColor switchCheckedTrackColor() const;
    QColor switchUncheckedHandleColor() const;
    QColor switchCheckedHandleColor() const;
    QColor switchDisabledTrackColor() const;
    QColor switchDisabledHandleColor() const;
    QColor scrollBarColor() const;
    QColor scrollBarHoveredColor() const;
    QColor scrollBarPressedColor() const;
    QColor dialogColor() const;
    QColor backgroundDimColor() const;
    QColor listHighlightColor() const;
    QColor tooltipColor() const;
    QColor toolBarColor() const;
    QColor toolTextColor() const;
    QColor spinBoxDisabledIconColor() const;

    Q_INVOKABLE QColor color(Color color, Shade shade = Shade500) const;
    Q_INVOKABLE QColor shade(const QColor &color, Shade shade) const;
    Q_INVOKABLE QColor rgba(QColor color, qreal opacity) const;

Q_SIGNALS:
    void themeChanged();
    void primaryChanged();
    void accentChanged();
    void foregroundChanged();
    void backgroundChanged();
    void elevationChanged();

    void paletteChanged();

protected:
    QQuickSilicaStyle *parentStyle() const;

#if (QT_VERSION >= QT_VERSION_CHECK(5, 10, 0))
    void attachedParentChange(QQuickAttachedObject *newParent, QQuickAttachedObject *oldParent) override;
#else
    void parentStyleChange(QQuickStyleAttached *newParent, QQuickStyleAttached *oldParent) override;
#endif

    template <typename M, typename ... A>
    void propagateHelper(M inheritMethod, const A & ...arguments);

private:
    void init();
    bool variantToRgba(const QVariant &var, const char *name, QRgb *rgba, bool *custom) const;

    QColor backgroundColor(Shade shade) const;
    QColor accentColor(Shade shade) const;
    QColor buttonColor(bool highlighted) const;
    Shade themeShade() const;

    // These reflect whether a color value was explicitly set on the specific
    // item that this attached style object represents.
    bool m_explicitTheme;
    bool m_explicitPrimary;
    bool m_explicitAccent;
    bool m_explicitForeground;
    bool m_explicitBackground;
    // These reflect whether the color value that was either inherited or
    // explicitly set is in the form that QColor expects, rather than one of
    // our pre-defined color enum values.
    bool m_customPrimary;
    bool m_customAccent;
    bool m_customForeground;
    bool m_customBackground;
    // These will be true when this item has an explicit or inherited foreground/background
    // color, or these colors were declared globally via settings (e.g. conf or env vars).
    // Some color properties of the style will return different values depending on whether
    // or not these are set.
    bool m_hasForeground;
    bool m_hasBackground;
    // The actual values for this item, whether explicit, inherited or globally set.
    Theme m_theme;
    uint m_primary;
    uint m_accent;
    uint m_foreground;
    uint m_background;
    int m_elevation;

#ifdef USE_MLITE
    MGConfItem m_gcHighlightColor;
    MGConfItem m_gcPrimaryColor;
    MGConfItem m_gcSecondaryColor;
    MGConfItem m_gcSecondaryHighlightColor;
#endif // USE_MLITE

    qreal m_paddingSmall;
    qreal m_paddingMedium;
    qreal m_paddingLarge;

    QColor m_highlightColor;
    QColor m_highlightBackgroundColor;
    QColor m_highlightDimmerColor;
    QColor m_primaryColor;
    QColor m_secondaryColor;
    QColor m_secondaryHighlightColor;
};

QT_END_NAMESPACE

QML_DECLARE_TYPEINFO(QQuickSilicaStyle, QML_HAS_ATTACHED_PROPERTIES)

#endif // QQUICKSILICASTYLE_P_H
